#include<bits/stdc++.h>
using namespace std;
string s;
int main(){
    cin>>s;
    for(int i=0;s[i];i++){
        if(s[i]<'0'||s[i]>'9')
          if(s[i+1]<'0'||s[i+1]>'9'){
              printf("%c",s[i]); continue;
          }
        for(int j=1;j<=s[i+1]-'0';j++)
          printf("%c",s[i]);
    }
    return 0;
}